This website gives you the recommended Gas Limit and GWEI to set on MetaMask before you move forward with a transaction: https://ethgasstation.info/.

This is the rule of thumb on average:
Fast (40 Gwei)– Your transaction will likely get picked up in the very next block.
Average (4 Gwei)– Your transaction will likely get picked up in next few blocks.
Slow (0.6 Gwei)– Your transaction will likely get picked after several minutes.

When you “Stake SPN” you are sending a transaction on the Ethereum blockchain so please set the proper GWEI before you send your transaction to make sure it goes through.